B4-72 Series explosion prevention centrifugal fans meet the requirements of GB3836.1-2000Electrical
apparatus for explosive gas atmospheres. Part 1:General requirements,GB3836.2-2000Electrical apparatus
for explosive gas atmospheres. Part 2: Flameproof "d"and JB8523-1997Ex fans technical conditions.
The Fans can be used for ventilating in the explosive environment in the flash point below the lowest form of flammable gas,air and their mixtures.
Fans of the documents through product design and product quality inspection center Ex-examination Samples
have to undergo a rigorous inspection and testing requirements, and made "explosion-proof certification".
Explosion sign of the fans is "Ex d II BT4", the fans can be used For the existence II A, II B, T1 ~T4 group explosive mixtures of gases establishments.
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